ULTRADYNE CHRYSLER CAMS

Are you looking for a real Chrysler camshaft designed for the Chrysler .904 lifter? Our mechanical flat tappet cams are not just a Chrysler core with a (Chevy) .842 lifter grind on them. They are designed to take full advantage of the .904 Mechanical flat tappet lifter and we can prove it!

It is true that we do not have a Hydraulic flat tappet cam designed for the .904 diameter lifter but they are coming soon. It is also possible for us to have ".842" or ".875" designs ground on a Chrysler cam core if the application warrants i.e. less lift, milder acceleration rates etc. Some maybe listed in the catalog that have been ground in that configuration and they are popular grinds so we list them, but we DO have masters specifically designed for the .904 Mechanical flat tappet lifter.

Note From Harold:
We have had some feed back from "A concerned Citizen" that we are lying when we say we are making real Chrysler cams, and that we are making Chevy Cams and calling them Chryslers. That’s true as far as Hydraulics go, but then our Chevy profiles are superior to others. When MUSCLE MOTORS first Dyno-tested our cams around 1990, they found our .875" lifter 309 outperformed EVERY mechanical flat tappet cam offered for the 440 with less wear.

Our NF .904" cams are .017" from the edge of a .904 tappet, and here’s a comparison showing who makes the " REAL CHRYSLER CAMS" (All data from published website info)

This is for any "concerned citizens"

Manufacturer/Grind

.020

.050

.200

Valve Lift (1.5 Rocker)

UltraDyne (NF60/NF57)

278/282

251/255

168/172

.570/.582

Hughes/Engle

275/281

245/250

164/167

.560/.575

UltraDyne (NF59/NF64)

290/298

263/271

181/188

.597/.620

Hughes/Engle

287/295

256/263

167/175

.587/.602

UltraDyne (1980 .842" Lifter)

292

259

170

.551

Crane (1998 .904" Lifter)

294

258

166

.560

UltraDyne (1985 .875" Lifter)

309

276

190

.613

Crane (1998 .904" Lifter)

314

278

186

.600

Let the numbers speak for themselves.UltraDyne Masters Comparison

NF
.842 FLAT TAPPET CAMS VL =.016" 1.5:1

.020

duration

.050

duration

.200

duration

lobe

lift

104

106

108

110

1.5

1.6

1.7

274

244

154

.3468

.107

.099

.092

.085

.520

.555

.590

278

248

158

.3534

.113

.106

.099

.092

.530

.565

.600

282

252

162

.3608

.120

.113

.106

.099

.541

.577

.613

286

256

167

.3680

.126

.119

.112

.105

.552

.589

.625

290

260

170

.3750

.134

.127

.120

.113

.563

.600

.638

294

264

174

.3820

.140

.133

.126

.119

.573

.611

.649

298

268

178

.3887

.148

.141

.134

.127

.583

.622

.661

304

274

185

.4000

.162

.155

.148

.141

.600

.640

.680

NF .904 FLAT TAPPET CAMS VL
=.016" 1.5:1

.020

duration

.050

duration

.200

duration

lobe

lift

104

106

108

110

1.5

1.6

1.7

274

247

164

.3727

.117

.110

.102

.095

.559

.596

.633

278

251

168

.3803

.125

.117

.110

.102

.570

.608

.646

282

255

172

.3879

.133

.125

.118

.110

.582

.620

.659

286

259

177

.3908

.141

.133

.126

.118

.587

.625

.664

290

263

181

.3980

.148

.141

.133

.126

.597

.637

.677

294

267

185

.4058

.157

.150

.142

.134

.609

.650

.690

298

271

188

.4134

.163

.155

.148

.140

.620

.662

703

304

277

193

.4265

.173

.165

.158

.150

.640

.683

.726

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13 Comments

I’ve heard that the Ultradyne cam w/ specs of 309′ duration and lift of .613″ on the intake and exhaust, is similar to a roller, but without the roller cam cost. Word has it, “This cam ramps up like a roller, but w/o the cost of a roller.”

I’m planning a ~500 horse 413, bored .30″ over (~420 cubic inches) and it’s going into a 1966 Dodge Coronet 500, 4-door sedan. It’ll be standard weight, with a 727 beefed torque-flite with a ~2800 stall converter, running through a 389 case Chrysler 8 3/4 with a limited slip 3.55 to 1 gearing. The heads will be moderately to extensivly worked “906” castings with adjustable rockers. Static compression will be around 9.5 to 10.0 using older Jahns flat-top forged aluminum pistons w/ eyebrow fly cuts. I will start with an ~800 cfm Holley or a monified 750 cfm Carter AVS off of a 440. I’d like to try a dual quad set up after I get it running and use (2) 500 cfm “Competition Series” Carter AFBs – that I currently have. This vehicle will be for hot street use with an occasional drag strip appearance.

I know I’ve said this twice before but if anyone reads this post and you have one of those Ultradyne 640 cams and its in good shape or still new in the box and you want to sell it please get in contact with me I’m extremely interested in it

Ok so I am in need of help. I have contacted Bullet cams which took over Ultradyne. I have all the numbers on my cam but I’m being told there should be a R number , I don’t see any R number. Below is my cam info. Any help Identifing this cam would be great. BBC
Master number 21/27
314/322
H7080
278/286@50
710/690
I am needing lobe separation and RPM band and if this is a roller cam.
Any info would be great.

Gary, maybe you can check for the presence of lobe-taper?
If present, then it’s not a roller cam.

Mark West,
I still have a new unused UD cam;
NF57 – Ultradyne mechanical, 255 @ .050″ w/ .582″ valvelift
I’ve had it installed in an engine once, only to remove it for a smaller cam before startup.
Not sure if I want to get rid of it because it was an expensive cam for me to get over here (Europe).

Though I do appreciate the offer there sir I am really looking for the ultradyne 640 cam so if anyone on here has one preferably brand-new unused or even if someone has the herb McCandless 324 650 lift cam I’d be interested in that too please contact me thanks and have a great day

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